3I/ATLAS Discovery Chart

3I/ATLAS is a visitor from beyond our solar system, only the third confirmed interstellar object ever seen passing through our neighbourhood, after the mysterious Oumuamua and the comet Borisov. Discovered by the ATLAS survey in July 2025 and confirmed as interstellar a day later, it is an icy wanderer on a hyperbolic path that will never return, rich in carbon dioxide, breathing out a coma of gas and dust as the Sun warms its ancient body. It may be more than seven billion years old, older than the Sun itself, a traveller carrying the memory of another part of the galaxy.

Cast for its moment of confirmation, the discovery chart carries a Cancer Sun, the most tender and emotional light of all, the sign of the mother, of home, homeland and the deep pull of belonging. How fitting for a nomad with no home, a crab drifting through the cold between stars, guarding some soft mystery within its shell. Its Moon rests in Libra, the beautiful, Venusian moon that seeks harmony and balance, an in-built radar for beauty and symmetry. So this frozen guest arrives dressed in longing and grace: a piece of somewhere else, passing gently, asking only to be seen before it goes.